There is an analagous demon that the Crystal People have that preys upon lover’s trust to abuse them. The Crystal People have an analogy to lovemaking involving two of them tickling each other’s pleasure centers using vibrations; it’s an expression of trust since you don’t want to do it with someone who isn’t going to be gentle with you, and the one you trust the most, the one you trust so much you’d trust them with your kids’ lives, is your life partner.

Totally, completely asexual beings would still have yet further demons who could control them through other base desires, like food or negative emotions. So nobody’s totally safe from the demon gang.